我有一个简单的问题。 我有一个文本字段, 它更新并填满了字符, 当字符长度为12( 12) 时, 我想执行动作。 例如, 当长度为 12 (12) 时, 我想要它做一些事情, 当长度为 24 时, 等等 。
我能做点什么吗?
if (textfield.text.length == 12){
//do something
}
希望有人能帮助我:)
感谢 谢谢
我有一个简单的问题。 我有一个文本字段, 它更新并填满了字符, 当字符长度为12( 12) 时, 我想执行动作。 例如, 当长度为 12 (12) 时, 我想要它做一些事情, 当长度为 24 时, 等等 。
我能做点什么吗?
if (textfield.text.length == 12){
//do something
}
希望有人能帮助我:)
感谢 谢谢
您应该使用该代表
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
如果你在大地上造化了自己,那末,你们可以使用它;如果你们在大地上造化了自己,就像在大地上造化了自己一样;
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
if (textfield.text.length == 12){
//do something
}
}
设置 < code> UIText FieldDelegate 并落实 < code> text Frield:should ChangeCharactersInRange: replacementString: 方法。计算一旦应用 replacementString
,文本字段将包含什么内容, 并按您需要做, 如果它与您正在查找的内容相符 。
请注意,这也要求删除和粘贴事件。
写下此代码 :
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if (textfield.text.length == 12)
{
condition......
}
else if (textfield.text.length == 24)
{
condition......
}
else
{
condition......
}
}
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